Linux Kernel up to 6.7-rc6 lib/idr.c ida_free null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.7-rc6. This issue affects the function ida_free in the library lib/idr.c. The manipulation leads to null pointer dereference. This vulnerability is uniquely identified as CVE-2023-6915. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.7-rc6 (Operating System) and classified as critical. This issue affects the function ida_free in the library lib/idr.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

A Null pointer dereference problem was found in ida_free in lib/idr.c in the Linux Kernel. This issue may allow an attacker using this library to cause a denial of service problem due to a missing check at a function return.

The weakness was disclosed 01/15/2024. It is possible to read the advisory at access.redhat.com. The identification of this vulnerability is CVE-2023-6915 since 12/18/2023. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 226419 (Linux Distros Unpatched Vulnerability : CVE-2023-6915), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.7-rc7 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch af73483f4e8b6f5c68c9aa63257bdd929a9c194a is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (226419) and EUVD (EUVD-2023-59114). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CNA Base Score: 6.2
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 226419
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-6915

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.7-rc7
Patch: af73483f4e8b6f5c68c9aa63257bdd929a9c194a

Timelineinfo

12/18/2023 🔍
01/15/2024 +28 days 🔍
01/15/2024 +0 days 🔍
07/24/2025 +555 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: af73483f4e8b6f5c68c9aa63257bdd929a9c194a
Status: Confirmed

CVE: CVE-2023-6915 (🔍)
GCVE (CVE): GCVE-0-2023-6915
GCVE (VulDB): GCVE-100-250727
EUVD: 🔍

Entryinfo

Created: 01/15/2024 10:42
Updated: 07/24/2025 01:02
Changes: 01/15/2024 10:42 (54), 02/03/2024 11:44 (1), 02/03/2024 11:51 (1), 06/26/2024 01:39 (29), 03/06/2025 00:35 (3), 07/24/2025 01:02 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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